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https://issues.apache.org/jira/browse/HADOOP-6028?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12718848#action_12718848
]
Steve Loughran commented on HADOOP-6028:
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web page contents
{code}
<RemoteException path="null" class="org.apache.hadoop.ipc.RemoteException"
message="java.lang.NullPointerException"/>
{code}
stack trace
{code}
09/06/12 15:21:58 INFO ipc.Server: IPC Server handler 3 on 8020, call
getBlockLocations(null, 0, 9223372036854775807) from 192.168.66.129:36887:
error: java.io.IOException: java.lang.NullPointerException
java.io.IOException: java.lang.NullPointerException
at
org.apache.hadoop.hdfs.server.namenode.INode.getPathComponents(INode.java:322)
at
org.apache.hadoop.hdfs.server.namenode.INode.getPathComponents(INode.java:317)
at
org.apache.hadoop.hdfs.server.namenode.INodeDirectory.getNode(INodeDirectory.java:124)
at
org.apache.hadoop.hdfs.server.namenode.FSDirectory.getFileINode(FSDirectory.java:776)
at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getBlockLocations(FSNamesystem.java:721)
at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getBlockLocations(FSNamesystem.java:687)
at
org.apache.hadoop.hdfs.server.namenode.NameNode.getBlockLocations(NameNode.java:642)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:508)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:964)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:960)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:396)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:958)
{code}
> NPE server side when getting http://namenode/fileChecksum/*
> ------------------------------------------------------------
>
> Key: HADOOP-6028
> URL: https://issues.apache.org/jira/browse/HADOOP-6028
> Project: Hadoop Core
> Issue Type: Bug
> Components: dfs
> Affects Versions: 0.21.0
> Reporter: Steve Loughran
> Priority: Minor
>
> when using http://namenode/fileChecksum/* to see if the checksum servlet is
> live, I see an NPE message client side, and a stack trace on the namenode
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